Electrical police signal



Sept. 4, 1928. 1,683,274

F. P. A. WEYLER ET AL ELECTRICAL POLICE SIGNAL Filed Sept. 20, 1926 '2 Sheets-Sheet 1 35 I HQB Invenfors I Ferciiumcbnd/ Paid UMSTWJEI d, an Homm Fwed, by G775 I o (I, I! w Sept. 4, 1928. 1,683,274

F. P. A. WEYLER ET AL ELECTRICAL POLICE SIGNAL,-

Filed Sept. 20, 1926 2 Sheets-Sheet 2 mve more .Ferdifiand PCLLLL August WeyLerand Horace Fre ecl Patented sept. 4, 1928.

UNITED STATES 1,683,274 PATENT -FlucE.

FERDINAND PAUL AUGUST WEYLER AND HORACE FREE-D, 0F PHILADELPHIA,

' PENNSYLVANIA.

ELECTRICAL POLICE SIGNAL.

The present device enables a central police station to call up a single or simultaneously- 5 municate information either singly at an in- 1 dividual box or simultaneously at a. number of boxes, and to reproduce the messages either secretly to the hearer or by broadcasting it, from one or several or all the boxes by a 0 loud speakin instrumentality. It consists, essentially, 0 a suitable centerphone system, that is a system in which a central telephone station is connected to several outlying boxes which it can call individually or collectively, 5 combined with various instrumentalities in thecentral station and at the boxes. By their use an ordinary centerphone system is enabled, commonly, though not necessarily, without a change in the street connections, 0 to givea light signal, or. a loud speaking effect at any box, or several, or all of them as well as to serve the ordinary purposes of mutual communication between the station and the boxes, which are not interfered with 5 by the inclusion of these instrumentalities in the system, and the box is not interfered with as a transmitting instrumentality by their use more than it is by the use of the ordinary calling from the station. It also 0 contains means for notifying the station that a person at the box wishes to get into communication, which will operate even during the signalling or broadcasting of loud speaking, so that a person at the box can always be assured of his ability to communicate to the station his need to communicate with it.

In describing my device, I have illustrated the centerphone stem as the No. 12 A. of the Connecticut elegraph and Telephone Company, a very generally used centerphone system,

Fig.1 is a view of a suitable form of box. Fig. 2 is a diagram of a system, equipped with the instrumentalities of my device.

"Fig. 3 is a detail of an instrumentality for.

J automatically repeating signals. I v The centerphone system illustrated has a 2 wire talking circuit, common to all boxes, and anindividual ringing circuit for each box, using in the later mentioned circuit for each bo'x, a single individual wire and a wire common to all circuits, and using for the ringing circuit ringi the bell at the station this common return wire and oneof the wires of the common talking circuit. It has the ringing battery, 60, and the talking battery, 61, and the station and boxes are furnished with the ordinary switches, (usually jack plugs), by which the individual ringing circuit to each box is made and broken. This or a similar system is used at the present time in many police box systems. We have combined with such a centerphone system, not necessarily precisely as illustrated but having its general character, instrumentalities that enlarge its capacities. We combine it, at the station, with switches and batteries of higher potential, and at the boxes with instrumentalities, most advantageously in the form of relays, that when a current of higher potential shall pass through the talking circuit will divert the course of the current of the talking circuit so that it will flow through a loud speaker,and, when a current of higher potential passes through the ringing (calling) circuit, a lighting current is thrown on at the box and a signal lamp lighted there and combine these instrumentalities with instrumentalities at the station that enable the calling signals to be given at one or simultaneously several of these boxes, and to be given continuously, intermittently at the will of the signaller or repeated rhythmically and automatically.

Describingnow the best form of our device of which we are at present aware :-A represents a station, and B and C two of the boxes, 15 a common return wire of the circuits for ringing the boxes, 11 and 12 are individual callingwires to boxes B and C respectively, 2 is a station telephone hook switch contacting when the receiver is lifted with the contact, 3, that is in electrical connection with the inductance, 4, and through the lead, 1, with the wire, 15, of the common talking circuit. The hook, 2, is also in constant electrical connection with the other wire, 14, of the; talking circuit. The ringing'bells, 6, 6, at the station A are connected by a lead, 9, with the wire, 13, but the lead, 10, instead of being carried directly to the battery, 60, passes to it through the lead, 16, and switch, 108, and lead, 17 A lead, 8, connects electrically the station bell circuit through the general conductor, 7, and the switches, 52, 53, 54, 55, and 56, (up to the number of boxes) with the leads leading to the individual box ringing circuits. The leads, 28, and 29, connected to the wires, 11, and 12, only, are shown. The boxes B and C have the ringing circuits comprising bells, 43, 43, and leads, 41, 41, in connection with a common return wire tothe battery, (formed by one of the wires, .14, of the talking circuit in the centerphone system illustrated) and the leads, '40, 40,

connected to the individual signal wires of the box; wire, 11, of box B and wire, 12, of

box C. The talking circuit includes the leads, 41, and 105. These elements are not new (except as above noted) and the novelty of our device lies in combining the instrumentalities'hereinafter described into this general class of circuits. I t

The lead, 40, at the box B, has the relay, 93, connected in parallel with it, the resistance, 67, being also included in the shunt circuit, 65, if necessary. This relay has an armature,.69, that, when av current of sulficiently high potential has energized the relay, 93, closes the'circuit through a lead, 110,

and containing a source of electrical energy, 63, and a lamp, 64. At the box, C the armature, 92, the shunt circuit, 89, the resistance,

95, lamp, 164, and the circuit leads, 80, and

81, including the source of electrical energy, 63, arelocated and operate in like manner.

The box B likewise has the relay, 95, in a shunt circuit, 97, which contains also a resistance, 111, if required to supplement the resistance of, the relay. The lead,98, is connected through the armature, 101, when the relay is inactive, with the lead, 99, that is connected to the lead, 105, leading to the box telephone receiver, and, when a current of high enough potential passes through the lead, 98, to'energize it, the loud speaker, 94.

As the loud speaker will be, used when the telephone hook of the box is down, it is connected to the lead, 41, by the lead, 100; The loudspeaker battery, 125, is included in a circuit, 122, that is closed by the armature, 120, ofthe relay, 121, set in a relay circuit, 123, in parallel with the lead, 98. The switch, 103, closes the circuit through the lead, 102,

in electrical connection wth the lead, 41,

and including the bells, 6, 6, at the station, and although the loud speaker or the regular speaking c rcuit be in operation will ring them notifying the station that a person is pole (a fixed pole) at the terminal, 76, from which a lead, 22, runs connecting it with the lead, 14. The battery, 61, is a talking battery that instead of having the positive pole directly connected to the wire, 15, has a lead, 20, connecting it with a pole, 150, of the switch, 109, and its negative pole connected to the terminal, 59, of the switch, 109, by the A lead, 26.' The switches, 108, and 109, are dguble throw double pole switches prefera ly.

Having above described the ringing and talking circuits, as modified for the particular purposes of our improvement, and also the relays and circuits in the typical preferred form of box, we will now describe the instrumentalities for operating the boxes from the station. The signalling light is operated by increasing the electro-motive force of the current passing through the con.- ductor, 40,, so that its potential will be suflicient to make it overcome the resistance in the shunt circuit, 65, and energize the relay," 93. This we do in practice by replacing 1n the circuit the battery, 60, by the battery, 62, which is of much higher potential than the battery, 60. v

In practice, we connect a pole of this battery with the contact, 78, of'the switch, 108,

and the other pole of the battery, 62, with the terminal, 57, of the switch, 108. The turning of the switch will leave the circuit between the terminals, 71, and 7 5, through the station' and boxes the same, but the battery, 62, will re lace the battery, 60, in the circuit.

The inc usion of a battery, 66,, of higher potential than the battery, 61, in the talking circuit can be similarly accomplished by connecting one of its vpoles through a lead, 58, with the terminal, 57 of the switch, 109, and

the other of this batterys poles through a lead, 30, with the terminal, 153, of this switch. The turning of the switch, 108 will leave the talking circuit, through the station unchanged, and the talking circuit through the typical preferred form of box unaltered, except where diverted by the relay, 95, the battery, 66, being substituted for, the battery, 61. The battery, 66, has suflicient potential to cause a current of suflicient electro-motive force to flow in the lead, 20, to

overcome the resistance of the shunt circuits, 97, and 98, and energize therelays, 121, and

95, closing the circuit through the battery, 125,

and loudspeaker, 94, and through a lead, 96, the loud speaker, 94, and thelead, 100, to the lead, 41.

The instrumentalities enable the station to send out signals to a single station, and to broadcast from a loudspeaker simultaneous- 1y, from a number of boxes. We'have also added to these a multiple pole switch, 51,

Ill!

which is connected-by leads, as 37, 37 to the individual signaling lines of a number of boxes, and an automatic signalling device such as a rotary drum, 50, to the axis of which is connected the wire, 31, switch, 70, and wire, 33. The brushes, 91, and Y92, and leads, 35, and 34, are connected electrically to their individual signalling wires, 28, and 29.

The box C has the loud speaker somewhat difi'erently arranged, so that the loud speaker operates only when the telephone receiver is off the hook. The leads, 84, and 85, form a shunt circuit including the relay, 101, and the resistance, 90, in parallel with the circuit through the telephone receiver. The wires, 93, and 86, through which, alternately, the circuit is made by the vibrations of the armature, 941, also both are connected electrically to the wire, 105, the lead, 87, is in electrical connection with both the armature, 941, and the wire, 15, the wire, 105, is out of circuit until the hook is lifted, so the loud speaker at box C will not operate until the light or bell is answered. The operation of the loud speaker booster batteryand its circuit is not illustrated in connection with the loud speaker, 88, but is the same as is illustrated at box C.

The switches, 71, 51, the automatic repeater, 50, and the switches, 108, and 109, can all be placed at asingle switch board at the station. B mani ulation of the switches the various e ects Portions of these effects can be produced successively, or some completely omitted. For instance, the circuits through the plugs, 52,

' and 55, alone can be made, ringing two boxes onl Then the battery, 62, can be thrown in y turning the switch, 108, and then the loud speakers in boxes of the B type thrown on all over the district by turning the switch, 109.

The circuit through the batteries can be shifted with single pole switches, if desired, but this is not as desirable as the arrangement illustrated, and many changes can be made in the details of the circuits without departing from our invention.

We claim a 1. In a police alarm system, having a central station, and a series of outlying boxes which are callable and communicable with both individually and collectively'from the esired can be produced.

the potential of the sources of electrical current traversing these ringing circuits, and a circuit includin the signal light, and a source of electrica lighting energy and the armatures of said relays and closed by these relays.

2 The device as defined in claim 1 with the additional element :and means for automatically giving said signals in a fixed repetitive order.

3. The device as defined in claim 1, with the following additional element :and a multiple pole switch for throwing on simultaneously plural circuits through a number of outlying boxes. 4. In a police alarm system having a central station, and a series of outlying boxes, which are callable and communicable with both individually and collectively from the central station, of a loud speaker placed in circuit at each of the boxes in the district, a relay in shunt in the talking circuit at these boxes operative when a current of high or electromotive force traverses the circuit and inoperative when a current of lower electromotive force traverses it, a circuitthrough the loud speaker including the armature of the relay and closed when the current of higher electro-motive force traverses the talking circuit, or source of electrical energy, and means at the station for increasing the potential of this source of electrical energy.

5; The device as defined in claim 4 with the additional element :-and a booster battery for the loud speaker, and a relay operative when the current of higher electro-motive force traverses the talking circuit, and a circuit containing the booster battery, the loud speaker, and the armature of'said latter relay, and closed when the said relay is inoperative.

6. The device as defined in claim 4, with the following additional element :the shunt circuit containing the relay being connectedacross the leads electrically connected to the talking wires of the center telephone system and thecircuit containing the loud speaker being also connected across the same wires. Q

FERDINAND PAUL AUG. WEYLER.

- HORACE FREED. 

